Tractor cab



FIG. 1 is a perspective view as seen from the left front of the tractor cab embodying our new design it being understood that the broken lines are for illustrative purposes only;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a left side elevation view thereof; and

FIG. 4 is a rear elevation view thereof;

The side opposite to that shown in the drawing is substantially a mirror image thereof, and the top of the cab is substantially flat and unornamented. 

The ornamental design for a tractor cab, substantially as shown and described. 